Problem is that humans are experts at making others pay for their actions. First it's all humans making other species and the ecosystem as a whole pay, then the more wealthy and powerful, and more responsible for the damage done, making those below them pay, and this happens at every "tier", not just those at the very top doing it to everyone else. Those poorer than others, weaker, of less social standing, less politically represented, or just different in whatever way, they get to pay the price for what those above them do, and for the better lives those lead.
And by the time we may be talking of the planet sorting itself out without humans, there may be little left of it to sort out, outside self-sustaining bunkers of the remaining (formerly) rich and powerful, if they wouldn't have moved to orbital stations or Moon or eventually Mars bases by then, leaving a barren wasteland behind. And while life will likely find a way to recover even from that, there is the ticking time bomb of the Sun to consider. Earth's some 4.6 billion years old, it took some 2 billion years for the fluke that allowed complex life to eventually develop to happen once, and while at the moment we're the ones doing that, in about one billion years the Sun's expansion will most likely bring about a runaway heating that will make it darn hard for complex life to exist on Earth, and in some 3 billion years it'll be inhospitable to pretty much all life, so the window of opportunity for starting over and getting back here is closing.